src/CutAndPaste.C

   1 /*
   2  * \file CutAndPaste.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jürgen Vigna
   7  * \author Lars Gullik Bjønnes
   8  * \author Alfredo Braunstein
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "CutAndPaste.h"
  16
  17 #include "buffer.h"
  18 #include "buffer_funcs.h"
  19 #include "bufferparams.h"
  20 #include "BufferView.h"
  21 #include "cursor.h"
  22 #include "debug.h"
  23 #include "errorlist.h"
  24 #include "funcrequest.h"
  25 #include "gettext.h"
  26 #include "lfuns.h"
  27 #include "lyxrc.h"
  28 #include "lyxtext.h"
  29 #include "lyxtextclasslist.h"
  30 #include "paragraph.h"
  31 #include "paragraph_funcs.h"
  32 #include "ParagraphParameters.h"
  33 #include "ParagraphList_fwd.h"
  34 #include "pariterator.h"
  35 #include "undo.h"
  36
  37 #include "insets/insettabular.h"
  38
  39 #include "mathed/math_data.h"
  40 #include "mathed/math_inset.h"
  41 #include "mathed/math_support.h"
  42
  43 #include "support/lstrings.h"
  44
  45 #include <boost/tuple/tuple.hpp>
  46
  47 using lyx::pos_type;
  48 using lyx::pit_type;
  49 using lyx::textclass_type;
  50
  51 using lyx::support::bformat;
  52
  53 using std::endl;
  54 using std::for_each;
  55 using std::make_pair;
  56 using std::pair;
  57 using std::vector;
  58 using std::string;
  59
  60
  61 namespace {
  62
  63 typedef std::pair<lyx::pit_type, int> PitPosPair;
  64
  65 typedef limited_stack<pair<ParagraphList, textclass_type> > CutStack;
  66
  67 CutStack theCuts(10);
  68
  69 struct resetOwnerAndChanges : public std::unary_function<Paragraph, void> {
  70         void operator()(Paragraph & p) const {
  71                 p.cleanChanges();
  72                 p.setInsetOwner(0);
  73         }
  74 };
  75
  76
  77 void region(CursorSlice const & i1, CursorSlice const & i2,
  78         InsetBase::row_type & r1, InsetBase::row_type & r2,
  79         InsetBase::col_type & c1, InsetBase::col_type & c2)
  80 {
  81         InsetBase & p = i1.inset();
  82         c1 = p.col(i1.idx());
  83         c2 = p.col(i2.idx());
  84         if (c1 > c2)
  85                 std::swap(c1, c2);
  86         r1 = p.row(i1.idx());
  87         r2 = p.row(i2.idx());
  88         if (r1 > r2)
  89                 std::swap(r1, r2);
  90 }
  91
  92
  93 bool checkPastePossible(int index)
  94 {
  95         return size_t(index) < theCuts.size() && !theCuts[index].first.empty();
  96 }
  97
  98
  99 pair<PitPosPair, pit_type>
 100 pasteSelectionHelper(Buffer const & buffer, ParagraphList & pars,
 101         pit_type pit, int pos,
 102         textclass_type tc, size_t cut_index, ErrorList & errorlist)
 103 {
 104         if (!checkPastePossible(cut_index))
 105                 return make_pair(PitPosPair(pit, pos), pit);
 106
 107         BOOST_ASSERT (pos <= pars[pit].size());
 108
 109         // Make a copy of the CaP paragraphs.
 110         ParagraphList insertion = theCuts[cut_index].first;
 111         textclass_type const textclass = theCuts[cut_index].second;
 112
 113         // Now remove all out of the pars which is NOT allowed in the
 114         // new environment and set also another font if that is required.
 115
 116         // Make sure there is no class difference.
 117         lyx::cap::SwitchLayoutsBetweenClasses(textclass, tc, insertion,
 118                                     errorlist);
 119
 120         ParagraphList::iterator tmpbuf = insertion.begin();
 121         int depth_delta = pars[pit].params().depth() - tmpbuf->params().depth();
 122
 123         Paragraph::depth_type max_depth = pars[pit].getMaxDepthAfter();
 124
 125         for (; tmpbuf != insertion.end(); ++tmpbuf) {
 126                 // If we have a negative jump so that the depth would
 127                 // go below 0 depth then we have to redo the delta to
 128                 // this new max depth level so that subsequent
 129                 // paragraphs are aligned correctly to this paragraph
 130                 // at level 0.
 131                 if (int(tmpbuf->params().depth()) + depth_delta < 0)
 132                         depth_delta = 0;
 133
 134                 // Set the right depth so that we are not too deep or shallow.
 135                 tmpbuf->params().depth(tmpbuf->params().depth() + depth_delta);
 136                 if (tmpbuf->params().depth() > max_depth)
 137                         tmpbuf->params().depth(max_depth);
 138
 139                 // Only set this from the 2nd on as the 2nd depends
 140                 // for maxDepth still on pit.
 141                 if (tmpbuf != insertion.begin())
 142                         max_depth = tmpbuf->getMaxDepthAfter();
 143
 144                 // Set the inset owner of this paragraph.
 145                 tmpbuf->setInsetOwner(pars[pit].inInset());
 146                 for (pos_type i = 0; i < tmpbuf->size(); ++i) {
 147                         if (tmpbuf->getChar(i) == Paragraph::META_INSET) {
 148                                 if (!pars[pit].insetAllowed(tmpbuf->getInset(i)->lyxCode()))
 149                                         tmpbuf->erase(i--);
 150                         }
 151                 }
 152         }
 153
 154         // Make the buf exactly the same layout as the cursor paragraph.
 155         insertion.begin()->makeSameLayout(pars[pit]);
 156
 157         // Prepare the paragraphs and insets for insertion.
 158         // A couple of insets store buffer references so need updating.
 159         InsetText in;
 160         std::swap(in.paragraphs(), insertion);
 161
 162         ParIterator fpit = par_iterator_begin(in);
 163         ParIterator fend = par_iterator_end(in);
 164
 165         for (; fpit != fend; ++fpit) {
 166                 InsetList::iterator lit = fpit->insetlist.begin();
 167                 InsetList::iterator eit = fpit->insetlist.end();
 168
 169                 for (; lit != eit; ++lit) {
 170                         switch (lit->inset->lyxCode()) {
 171                         case InsetOld::TABULAR_CODE: {
 172                                 InsetTabular * it = static_cast<InsetTabular*>(lit->inset);
 173                                 it->buffer(&buffer);
 174                                 break;
 175                         }
 176
 177                         default:
 178                                 break; // nothing
 179                         }
 180                 }
 181         }
 182         std::swap(in.paragraphs(), insertion);
 183
 184         // Split the paragraph for inserting the buf if necessary.
 185         bool did_split = false;
 186         if (pars[pit].size() || pit + 1 == pit_type(pars.size())) {
 187                 breakParagraphConservative(buffer.params(), pars, pit, pos);
 188                 did_split = true;
 189         }
 190
 191         // Paste it!
 192         pars.insert(pars.begin() + pit + 1, insertion.begin(), insertion.end());
 193         mergeParagraph(buffer.params(), pars, pit);
 194
 195         pit_type last_paste = pit + insertion.size() - 1;
 196
 197         // Store the new cursor position.
 198         pit = last_paste;
 199         pos = pars[last_paste].size();
 200
 201         // Maybe some pasting.
 202         if (did_split && last_paste + 1 != pit_type(pars.size())) {
 203                 if (pars[last_paste + 1].hasSameLayout(pars[last_paste])) {
 204                         mergeParagraph(buffer.params(), pars, last_paste);
 205                 } else if (pars[last_paste + 1].empty()) {
 206                         pars[last_paste + 1].makeSameLayout(pars[last_paste]);
 207                         mergeParagraph(buffer.params(), pars, last_paste);
 208                 } else if (pars[last_paste].empty()) {
 209                         pars[last_paste].makeSameLayout(pars[last_paste + 1]);
 210                         mergeParagraph(buffer.params(), pars, last_paste);
 211                 } else {
 212                         pars[last_paste + 1].stripLeadingSpaces();
 213                         ++last_paste;
 214                 }
 215         }
 216
 217         return make_pair(PitPosPair(pit, pos), last_paste + 1);
 218 }
 219
 220
 221 PitPosPair eraseSelectionHelper(BufferParams const & params,
 222         ParagraphList & pars,
 223         pit_type startpit, pit_type endpit,
 224         int startpos, int endpos, bool doclear)
 225 {
 226         if (startpit == pit_type(pars.size()) ||
 227             (startpos > pars[startpit].size()))
 228                 return PitPosPair(endpit, endpos);
 229
 230         if (endpit == pit_type(pars.size()) ||
 231             startpit == endpit) {
 232                 endpos -= pars[startpit].erase(startpos, endpos);
 233                 return PitPosPair(endpit, endpos);
 234         }
 235
 236         // clear end/begin fragments of the first/last par in selection
 237         bool all_erased = true;
 238
 239         pars[startpit].erase(startpos, pars[startpit].size());
 240         if (pars[startpit].size() != startpos)
 241                 all_erased = false;
 242
 243         endpos -= pars[endpit].erase(0, endpos);
 244         if (endpos != 0)
 245                 all_erased = false;
 246
 247         // Loop through the deleted pars if any, erasing as needed
 248         for (pit_type pit = startpit + 1; pit != endpit;) {
 249                 // "erase" the contents of the par
 250                 pars[pit].erase(0, pars[pit].size());
 251                 if (!pars[pit].size()) {
 252                         // remove the par if it's now empty
 253                         pars.erase(pars.begin() + pit);
 254                         --endpit;
 255                 } else {
 256                         ++pit;
 257                         all_erased = false;
 258                 }
 259         }
 260
 261 #if 0 // FIXME: why for cut but not copy ?
 262         // the cut selection should begin with standard layout
 263         if (realcut) {
 264                 buf->params().clear();
 265                 buf->bibkey = 0;
 266                 buf->layout(textclasslist[buffer->params.textclass].defaultLayoutName());
 267         }
 268 #endif
 269
 270         if (startpit + 1 == pit_type(pars.size()))
 271                 return PitPosPair(endpit, endpos);
 272
 273         if (doclear) {
 274                 pars[startpit + 1].stripLeadingSpaces();
 275         }
 276
 277         // paste the paragraphs again, if possible
 278         if (all_erased &&
 279             (pars[startpit].hasSameLayout(pars[startpit + 1]) ||
 280              pars[startpit + 1].empty())) {
 281                 mergeParagraph(params, pars, startpit);
 282                 // this because endpar gets deleted here!
 283                 endpit = startpit;
 284                 endpos = startpos;
 285         }
 286
 287         return PitPosPair(endpit, endpos);
 288
 289 }
 290
 291
 292 void copySelectionHelper(ParagraphList & pars,
 293         pit_type startpit, pit_type endpit,
 294         int start, int end, textclass_type tc)
 295 {
 296         BOOST_ASSERT(0 <= start && start <= pars[startpit].size());
 297         BOOST_ASSERT(0 <= end && end <= pars[endpit].size());
 298         BOOST_ASSERT(startpit != endpit || start <= end);
 299
 300         // Clone the paragraphs within the selection.
 301         ParagraphList paragraphs(pars.begin() + startpit, pars.begin() + endpit + 1);
 302         for_each(paragraphs.begin(), paragraphs.end(), resetOwnerAndChanges());
 303
 304         // Cut out the end of the last paragraph.
 305         Paragraph & back = paragraphs.back();
 306         back.erase(end, back.size());
 307
 308         // Cut out the begin of the first paragraph
 309         Paragraph & front = paragraphs.front();
 310         front.erase(0, start);
 311
 312         theCuts.push(make_pair(paragraphs, tc));
 313 }
 314
 315
 316
 317 PitPosPair cutSelectionHelper(BufferParams const & params,
 318         ParagraphList & pars, pit_type startpit, pit_type endpit,
 319         int startpos, int endpos, textclass_type tc, bool doclear)
 320 {
 321         copySelectionHelper(pars, startpit, endpit, startpos, endpos, tc);
 322         return eraseSelectionHelper(params, pars, startpit, endpit,
 323                 startpos, endpos, doclear);
 324 }
 325
 326
 327 } // namespace anon
 328
 329
 330
 331
 332 namespace lyx {
 333 namespace cap {
 334
 335 string grabAndEraseSelection(LCursor & cur)
 336 {
 337         if (!cur.selection())
 338                 return string();
 339         string res = grabSelection(cur);
 340         eraseSelection(cur);
 341         cur.selection() = false;
 342         return res;
 343 }
 344
 345
 346 int SwitchLayoutsBetweenClasses(textclass_type c1, textclass_type c2,
 347         ParagraphList & pars, ErrorList & errorlist)
 348 {
 349         BOOST_ASSERT(!pars.empty());
 350         int ret = 0;
 351         if (c1 == c2)
 352                 return ret;
 353
 354         LyXTextClass const & tclass1 = textclasslist[c1];
 355         LyXTextClass const & tclass2 = textclasslist[c2];
 356
 357         InsetText in;
 358         std::swap(in.paragraphs(), pars);
 359
 360         ParIterator end = par_iterator_end(in);
 361         for (ParIterator it = par_iterator_begin(in); it != end; ++it) {
 362                 string const name = it->layout()->name();
 363                 bool hasLayout = tclass2.hasLayout(name);
 364
 365                 if (hasLayout)
 366                         it->layout(tclass2[name]);
 367                 else
 368                         it->layout(tclass2.defaultLayout());
 369
 370                 if (!hasLayout && name != tclass1.defaultLayoutName()) {
 371                         ++ret;
 372                         string const s = bformat(
 373                                 _("Layout had to be changed from\n%1$s to %2$s\n"
 374                                 "because of class conversion from\n%3$s to %4$s"),
 375                          name, it->layout()->name(), tclass1.name(), tclass2.name());
 376                         // To warn the user that something had to be done.
 377                         errorlist.push_back(ErrorItem("Changed Layout", s,
 378                                                       it->id(), 0,
 379                                                       it->size()));
 380                 }
 381         }
 382         std::swap(in.paragraphs(), pars);
 383         return ret;
 384 }
 385
 386
 387 std::vector<string> const availableSelections(Buffer const & buffer)
 388 {
 389         vector<string> selList;
 390
 391         CutStack::const_iterator cit = theCuts.begin();
 392         CutStack::const_iterator end = theCuts.end();
 393         for (; cit != end; ++cit) {
 394                 // we do not use cit-> here because gcc 2.9x does not
 395                 // like it (JMarc)
 396                 ParagraphList const & pars = (*cit).first;
 397                 string asciiSel;
 398                 ParagraphList::const_iterator pit = pars.begin();
 399                 ParagraphList::const_iterator pend = pars.end();
 400                 for (; pit != pend; ++pit) {
 401                         asciiSel += pit->asString(buffer, false);
 402                         if (asciiSel.size() > 25) {
 403                                 asciiSel.replace(22, string::npos, "...");
 404                                 break;
 405                         }
 406                 }
 407
 408                 selList.push_back(asciiSel);
 409         }
 410
 411         return selList;
 412 }
 413
 414
 415 int nrOfParagraphs()
 416 {
 417         return theCuts.empty() ? 0 : theCuts[0].first.size();
 418 }
 419
 420
 421 void cutSelection(LCursor & cur, bool doclear, bool realcut)
 422 {
 423         if (cur.inTexted()) {
 424                 LyXText * text = cur.text();
 425                 BOOST_ASSERT(text);
 426                 // Stuff what we got on the clipboard. Even if there is no selection.
 427
 428                 // There is a problem with having the stuffing here in that the
 429                 // larger the selection the slower LyX will get. This can be
 430                 // solved by running the line below only when the selection has
 431                 // finished. The solution used currently just works, to make it
 432                 // faster we need to be more clever and probably also have more
 433                 // calls to stuffClipboard. (Lgb)
 434                 cur.bv().stuffClipboard(cur.selectionAsString(true));
 435
 436                 // This doesn't make sense, if there is no selection
 437                 if (!cur.selection())
 438                         return;
 439
 440                 // OK, we have a selection. This is always between cur.selBegin()
 441                 // and cur.selEnd()
 442
 443                 // make sure that the depth behind the selection are restored, too
 444                 recordUndoSelection(cur);
 445                 pit_type begpit = cur.selBegin().pit();
 446                 pit_type endpit = cur.selEnd().pit();
 447
 448                 int endpos = cur.selEnd().pos();
 449
 450                 BufferParams const & bp = cur.buffer().params();
 451                 if (realcut) {
 452                         copySelectionHelper(text->paragraphs(),
 453                                 begpit, endpit,
 454                                 cur.selBegin().pos(), endpos,
 455                                 bp.textclass);
 456                 }
 457
 458                 boost::tie(endpit, endpos) =
 459                         eraseSelectionHelper(bp,
 460                                 text->paragraphs(),
 461                                 begpit, endpit,
 462                                 cur.selBegin().pos(), endpos,
 463                                 doclear);
 464
 465                 // sometimes necessary
 466                 if (doclear)
 467                         text->paragraphs()[begpit].stripLeadingSpaces();
 468
 469                 text->redoParagraphs(begpit, begpit + 1);
 470                 // cutSelection can invalidate the cursor so we need to set
 471                 // it anew. (Lgb)
 472                 // we prefer the end for when tracking changes
 473                 cur.pos() = endpos;
 474                 cur.pit() = endpit;
 475
 476                 // need a valid cursor. (Lgb)
 477                 cur.clearSelection();
 478                 text->updateCounters();
 479         }
 480
 481         if (cur.inMathed()) {
 482                 lyxerr << "cutSelection in mathed" << endl;
 483                 LCursor tmp = cur;
 484                 copySelection(cur);
 485                 cur.selection() = false;
 486                 eraseSelection(tmp);
 487         }
 488 }
 489
 490
 491 void copySelection(LCursor & cur)
 492 {
 493         // stuff the selection onto the X clipboard, from an explicit copy request
 494         cur.bv().stuffClipboard(cur.selectionAsString(true));
 495
 496         // this doesn't make sense, if there is no selection
 497         if (!cur.selection())
 498                 return;
 499
 500         if (cur.inTexted()) {
 501                 LyXText * text = cur.text();
 502                 BOOST_ASSERT(text);
 503                 // ok we have a selection. This is always between cur.selBegin()
 504                 // and sel_end cursor
 505
 506                 // copy behind a space if there is one
 507                 ParagraphList & pars = text->paragraphs();
 508                 pos_type pos = cur.selBegin().pos();
 509                 pit_type par = cur.selBegin().pit();
 510                 while (pos < pars[par].size()
 511                                          && pars[par].isLineSeparator(pos)
 512                                          && (par != cur.selEnd().pit() || pos < cur.selEnd().pos()))
 513                         ++pos;
 514
 515                 copySelectionHelper(pars, par, cur.selEnd().pit(),
 516                         pos, cur.selEnd().pos(), cur.buffer().params().textclass);
 517         }
 518
 519         if (cur.inMathed()) {
 520                 lyxerr << "copySelection in mathed" << endl;
 521                 ParagraphList pars;
 522                 pars.push_back(Paragraph());
 523                 BufferParams const & bp = cur.buffer().params();
 524                 pars.back().layout(bp.getLyXTextClass().defaultLayout());
 525                 for_each(pars.begin(), pars.end(), resetOwnerAndChanges());
 526                 pars.back().insert(0, grabSelection(cur), LyXFont());
 527                 theCuts.push(make_pair(pars, bp.textclass));
 528         }
 529 }
 530
 531
 532 std::string getSelection(Buffer const & buf, size_t sel_index)
 533 {
 534         return sel_index < theCuts.size()
 535                 ? theCuts[sel_index].first.back().asString(buf, false)
 536                 : string();
 537 }
 538
 539
 540 void pasteSelection(LCursor & cur, size_t sel_index)
 541 {
 542         // this does not make sense, if there is nothing to paste
 543         lyxerr << "#### pasteSelection " << sel_index << endl;
 544         if (!checkPastePossible(sel_index))
 545                 return;
 546
 547         if (cur.inTexted()) {
 548                 LyXText * text = cur.text();
 549                 BOOST_ASSERT(text);
 550
 551                 recordUndo(cur);
 552
 553                 pit_type endpit;
 554                 PitPosPair ppp;
 555
 556                 ErrorList el;
 557
 558                 boost::tie(ppp, endpit) =
 559                         pasteSelectionHelper(cur.buffer(),
 560                                                                 text->paragraphs(),
 561                                                                 cur.pit(), cur.pos(),
 562                                                                 cur.buffer().params().textclass,
 563                                                                 sel_index, el);
 564                 bufferErrors(cur.buffer(), el);
 565                 cur.bv().showErrorList(_("Paste"));
 566
 567                 text->redoParagraphs(cur.pit(), endpit);
 568
 569                 cur.clearSelection();
 570                 cur.resetAnchor();
 571                 text->setCursor(cur, ppp.first, ppp.second);
 572                 cur.setSelection();
 573                 text->updateCounters();
 574         }
 575
 576         if (cur.inMathed()) {
 577                 lyxerr << "### should be handled in MathNest/GridInset" << endl;
 578         }
 579 }
 580
 581
 582 void setSelectionRange(LCursor & cur, pos_type length)
 583 {
 584         LyXText * text = cur.text();
 585         BOOST_ASSERT(text);
 586         if (!length)
 587                 return;
 588         cur.resetAnchor();
 589         while (length--)
 590                 text->cursorRight(cur);
 591         cur.setSelection();
 592 }
 593
 594
 595 // simple replacing. The font of the first selected character is used
 596 void replaceSelectionWithString(LCursor & cur, string const & str)
 597 {
 598         LyXText * text = cur.text();
 599         BOOST_ASSERT(text);
 600         recordUndo(cur);
 601
 602         // Get font setting before we cut
 603         pos_type pos = cur.selEnd().pos();
 604         Paragraph & par = text->getPar(cur.selEnd().pit());
 605         LyXFont const font =
 606                 par.getFontSettings(cur.buffer().params(), cur.selBegin().pos());
 607
 608         // Insert the new string
 609         string::const_iterator cit = str.begin();
 610         string::const_iterator end = str.end();
 611         for (; cit != end; ++cit, ++pos)
 612                 par.insertChar(pos, (*cit), font);
 613
 614         // Cut the selection
 615         cutSelection(cur, true, false);
 616 }
 617
 618
 619 void replaceSelection(LCursor & cur)
 620 {
 621         if (cur.selection())
 622                 cutSelection(cur, true, false);
 623 }
 624
 625
 626 // only used by the spellchecker
 627 void replaceWord(LCursor & cur, string const & replacestring)
 628 {
 629         LyXText * text = cur.text();
 630         BOOST_ASSERT(text);
 631
 632         replaceSelectionWithString(cur, replacestring);
 633         setSelectionRange(cur, replacestring.length());
 634
 635         // Go back so that replacement string is also spellchecked
 636         for (string::size_type i = 0; i < replacestring.length() + 1; ++i)
 637                 text->cursorLeft(cur);
 638 }
 639
 640
 641 void eraseSelection(LCursor & cur)
 642 {
 643         //lyxerr << "LCursor::eraseSelection begin: " << cur << endl;
 644         CursorSlice const & i1 = cur.selBegin();
 645         CursorSlice const & i2 = cur.selEnd();
 646         if (i1.inset().asMathInset()) {
 647                 if (i1.idx() == i2.idx()) {
 648                         i1.cell().erase(i1.pos(), i2.pos());
 649                 } else {
 650                         MathInset * p = i1.asMathInset();
 651                         InsetBase::row_type r1, r2;
 652                         InsetBase::col_type c1, c2;
 653                         region(i1, i2, r1, r2, c1, c2);
 654                         for (InsetBase::row_type row = r1; row <= r2; ++row)
 655                                 for (InsetBase::col_type col = c1; col <= c2; ++col)
 656                                         p->cell(p->index(row, col)).clear();
 657                 }
 658                 cur.back() = i1;
 659                 cur.pos() = 0; // We've deleted the whole cell. Only pos 0 is valid.
 660                 cur.resetAnchor();
 661         } else {
 662                 lyxerr << "can't erase this selection 1" << endl;
 663         }
 664         //lyxerr << "LCursor::eraseSelection end: " << cur << endl;
 665 }
 666
 667
 668 void selDel(LCursor & cur)
 669 {
 670         //lyxerr << "LCursor::selDel" << endl;
 671         if (cur.selection()) {
 672                 eraseSelection(cur);
 673                 cur.selection() = false;
 674         }
 675 }
 676
 677
 678 void selClearOrDel(LCursor & cur)
 679 {
 680         //lyxerr << "LCursor::selClearOrDel" << endl;
 681         if (lyxrc.auto_region_delete)
 682                 selDel(cur);
 683         else
 684                 cur.selection() = false;
 685 }
 686
 687
 688 string grabSelection(LCursor & cur)
 689 {
 690         if (!cur.selection())
 691                 return string();
 692
 693         CursorSlice i1 = cur.selBegin();
 694         CursorSlice i2 = cur.selEnd();
 695
 696         if (i1.idx() == i2.idx()) {
 697                 if (i1.inset().asMathInset()) {
 698                         MathArray::const_iterator it = i1.cell().begin();
 699                         return asString(MathArray(it + i1.pos(), it + i2.pos()));
 700                 } else {
 701                         return "unknown selection 1";
 702                 }
 703         }
 704
 705         InsetBase::row_type r1, r2;
 706         InsetBase::col_type c1, c2;
 707         region(i1, i2, r1, r2, c1, c2);
 708
 709         string data;
 710         if (i1.inset().asMathInset()) {
 711                 for (InsetBase::row_type row = r1; row <= r2; ++row) {
 712                         if (row > r1)
 713                                 data += "\\\\";
 714                         for (InsetBase::col_type col = c1; col <= c2; ++col) {
 715                                 if (col > c1)
 716                                         data += '&';
 717                                 data += asString(i1.asMathInset()->
 718                                         cell(i1.asMathInset()->index(row, col)));
 719                         }
 720                 }
 721         } else {
 722                 data = "unknown selection 2";
 723         }
 724         return data;
 725 }
 726
 727
 728 } // namespace cap
 729 } // namespace lyx